Cu_(64)Zr_(36)非晶合金粉末的高温氧化行为  

High-temperature oxidation behavior of Cu_(64)Zr_(36)metallic glass powders

作　　者：张茂[1,2] 马云飞 黄婷 龚攀 王颖[3] 蔡洪钧 李巧敏 王新云 邓磊[1] Mao ZHANG;Yun-fei MA;Ting HUANG;Pan GONG;Ying WANG;Hong-jun CAI;Qiao-min LI;Xin-yun WANG;Lei DENG(State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;School of Mechanical Engineering,Wuhan Polytechnic University,Wuhan 430023,China;School of Mechanical Engineering and Automation,Wuhan Textile University,Wuhan 430073,China)

机构地区：[1]华中科技大学材料科学与工程学院,材料成形与模具技术国家重点实验室,武汉430074 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004 [3]武汉轻工大学机械工程学院,武汉430023 [4]武汉纺织大学机械工程与自动化学院,武汉430073

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第6期1814-1826,共13页中国有色金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51805181);the National Science Fund for Distinguished Young Scholars of China(No.51725504);the Fundamental Research Funds for the Central Universities of China(No.2020kfy XJJS049)。

摘　　要：通过气体雾化法制备Cu_(64)Zr_(36)非晶合金粉末。采用XRD、DSC、TGA、SEM和TEM等测试手段研究Cu_(64)Zr_(36)非晶合金粉末在内部因素(粉末粒径)和外部因素(氧化温度和氧化时间)影响下的高温氧化行为。分析非晶合金粉末的氧化动力学、氧化物组成、表面形貌和显微组织演变。实验结果表明,Cu_(64)Zr_(36)非晶合金粉末氧化后表面形成多层氧化物,氧化层主要成分为t-ZrO_(2)、m-ZrO_(2)、Cu_2O和CuO。氧化动力学遵循双级抛物线速率定律。氧化过程以O离子向内扩散和Cu离子向外扩散控制。热力学分析表明,随着粉末粒径的减小,氧化反应的吉布斯自由能变大,导致粒径更小的粉末氧化更为迅速且完全。Cu_(64)Zr_(36)metallic glass powders were prepared via gas atomization.The high-temperature oxidation behavior of Cu_(64)Zr_(36)metallic glass powders under the influence of internal factors(powder particle size)and external factors(oxidation temperature and oxidation time)was experimentally investigated by using XRD,DSC,TGA,SEM and TEM.The oxidation kinetics,oxide phase,surface morphology and microstructure of metallic glass powders were analyzed.The results show that Cu_(64)Zr_(36)metallic glass powders form multiple layers of surface oxides after oxidation and the major components of the surface oxides are t-ZrO_(2),m-ZrO_(2),Cu2O and CuO.The oxidation kinetics follows a double-stage parabolic rate law.The oxidation process is dominated by the inward diffusion of O anions and the outward diffusion of Cu cations.Thermodynamic analysis shows that the Gibbs free energy change of the oxidation reaction increases with the decrease of particle size,leading to a more rapid and thorough oxidation of the powder with a smaller particle size.

关 键 词：非晶合金粉末 高温氧化 热力学分析 离子扩散 抛物线速率定律 

分 类 号：TG139.8[一般工业技术—材料科学与工程]